[openib-general] [PATCH 1/2] rdma_cm: add support to join IPOIB multicast groups

[Or Gerlitz]

Sean Hefty wrote:
> Add to the rdma_cm an IPOIB port space that allows interoperability with
> IPoIB multicast traffic.  Use of the RDMA_PS_IPOIB is limited to multicast
> join/leave.

OK, Sean the patch looks perfectly fine for allowing multicast 
interoperability with IPoIB.

However, it will not support "mixed mode" communication patterns (which 
you were raising last week) that is one app having a UD QP for both 
multicast and unicast that talks with two "peers" IPoIB multicast and 
another app doing only unicast.

Such a scenario would have been supported if you allow for unicast apps 
to use the IPOIB port space as well - similar to the my version of the 
patch.

Also, just a clarification - how exactly the patch enforces that an app 
would not be able to do listen/connect/accept on RDMA_PS_IPOIB ID???

Or.